1/* 2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34#include <linux/slab.h> 35 36#include "mlx4.h" 37 38struct mlx4_device_context { 39 struct list_head list; 40 struct mlx4_interface *intf; 41 void *context; 42}; 43 44static LIST_HEAD(intf_list); 45static LIST_HEAD(dev_list); 46static DEFINE_MUTEX(intf_mutex); 47 48static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv) 49{ 50 struct mlx4_device_context *dev_ctx; 51 52 dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL); 53 if (!dev_ctx) 54 return; 55 56 dev_ctx->intf = intf; 57 dev_ctx->context = intf->add(&priv->dev); 58 59 if (dev_ctx->context) { 60 spin_lock_irq(&priv->ctx_lock); 61 list_add_tail(&dev_ctx->list, &priv->ctx_list); 62 spin_unlock_irq(&priv->ctx_lock); 63 } else 64 kfree(dev_ctx); 65} 66 67static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv) 68{ 69 struct mlx4_device_context *dev_ctx; 70 71 list_for_each_entry(dev_ctx, &priv->ctx_list, list) 72 if (dev_ctx->intf == intf) { 73 spin_lock_irq(&priv->ctx_lock); 74 list_del(&dev_ctx->list); 75 spin_unlock_irq(&priv->ctx_lock); 76 77 intf->remove(&priv->dev, dev_ctx->context); 78 kfree(dev_ctx); 79 return; 80 } 81} 82 83int mlx4_register_interface(struct mlx4_interface *intf) 84{ 85 struct mlx4_priv *priv; 86 87 if (!intf->add || !intf->remove) 88 return -EINVAL; 89 90 mutex_lock(&intf_mutex); 91 92 list_add_tail(&intf->list, &intf_list); 93 list_for_each_entry(priv, &dev_list, dev_list) 94 mlx4_add_device(intf, priv); 95 96 mutex_unlock(&intf_mutex); 97 98 return 0; 99} 100EXPORT_SYMBOL_GPL(mlx4_register_interface); 101 102void mlx4_unregister_interface(struct mlx4_interface *intf) 103{ 104 struct mlx4_priv *priv; 105 106 mutex_lock(&intf_mutex); 107 108 list_for_each_entry(priv, &dev_list, dev_list) 109 mlx4_remove_device(intf, priv); 110 111 list_del(&intf->list); 112 113 mutex_unlock(&intf_mutex); 114} 115EXPORT_SYMBOL_GPL(mlx4_unregister_interface); 116 117void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_dev_event type, int port) 118{ 119 struct mlx4_priv *priv = mlx4_priv(dev); 120 struct mlx4_device_context *dev_ctx; 121 unsigned long flags; 122 123 spin_lock_irqsave(&priv->ctx_lock, flags); 124 125 list_for_each_entry(dev_ctx, &priv->ctx_list, list) 126 if (dev_ctx->intf->event) 127 dev_ctx->intf->event(dev, dev_ctx->context, type, port); 128 129 spin_unlock_irqrestore(&priv->ctx_lock, flags); 130} 131 132int mlx4_register_device(struct mlx4_dev *dev) 133{ 134 struct mlx4_priv *priv = mlx4_priv(dev); 135 struct mlx4_interface *intf; 136 137 mutex_lock(&intf_mutex); 138 139 list_add_tail(&priv->dev_list, &dev_list); 140 list_for_each_entry(intf, &intf_list, list) 141 mlx4_add_device(intf, priv); 142 143 mutex_unlock(&intf_mutex); 144 mlx4_start_catas_poll(dev); 145 146 return 0; 147} 148 149void mlx4_unregister_device(struct mlx4_dev *dev) 150{ 151 struct mlx4_priv *priv = mlx4_priv(dev); 152 struct mlx4_interface *intf; 153 154 mlx4_stop_catas_poll(dev); 155 mutex_lock(&intf_mutex); 156 157 list_for_each_entry(intf, &intf_list, list) 158 mlx4_remove_device(intf, priv); 159 160 list_del(&priv->dev_list); 161 162 mutex_unlock(&intf_mutex); 163} 164